Nokia Corporation

Nokia Technologies Oy

Vivo Mobile Communication Co., Ltd.

Ossi Pöllänen

Uwe Schwarz

Jan Chipchase

Juhani Tuovinen

Jens Benner

Andrew Daymond

Timo Hakala

A method and corresponding equipment to enable a phone owner, who desires to lend a phone to a borrower, to define a temporary limit for the usage of the borrower, especially in a prepaid charging system. The charging system uses this temporary limit to restrict service usage such that when an amount corresponding to the temporary limit has been spent service is denied until such time as the limit has expired or been withdrawn, even if, for example, there is still a positive balance in the phone owner's own prepaid account.

Communication network subscription control

A power amplifier unit for a transmitter in a mobile communication system is set up so that the operational point of the power amplifier varies in dependence on the instant power level of its input signal. This is used in the context of a variable envelope input signal such that a constant gain of the power amplifier can be achieved by this feedback.

Power amplifier unit

Growing community of inventors

Espoo, Finland

Ossi Pöllänen